11.3

Table Of Contents
AUDIO AND MIDI BASICS39
The I/O device
The I/O device is always located at the top of the rack.
At the top of the rack is the i/o device (for "input/output"). This handles the audio communication between the de-
vices in the rack and the DAW host.
The input jacks deliver audio from the DAW host to devices in the rack. This is most often the case when Reason
Rack Plugin is used as an effect, and typically only the main (1-2) input jacks are used.
The output jacks deliver audio from devices in the rack to the DAW host. These are used both when Reason Rack
Plugin is an instrument and an effect.
On the front panel you find audio input and output indicators, lighting up whenever audio signals are received from
the DAW host (input) or sent back to the DAW host (output).
The first eight output pairs have more detailed meters, name labels matching the device names and buttons called
(sum) “To Main" (outputs 3-16 only). When sum To Main is on for an output pair, its signal is directed to the Main Out
(1-2) instead, and summed with any other signals there.
If you want to layer several instrument devices on a single stereo channel in your DAW, leave "To Main" on.
The three instruments (connected to outputs 1-2, 3-4 and 5-6) will all be sent out on Main Out 1-2 to the DAW.
If you want different devices in your rack to be routed to different audio channels in your DAW's mixer, turn off
"To Main" for these outputs.
The two instruments connected to outputs 1-2 and 3-4 will be sent out on Main Out 1-2 to the DAW. The instrument connected to
outputs 5-6 will be sent to the separate Out 5-6 outputs.